马路坪矿中深孔分段矿房不同跨度的稳定性分析

Stability Analysis on Different Spans of Sublevel Room of Medium-length Hole in Maluping Mine

马路坪矿是世界少有、国内目前唯一不经选矿便可直接生产高浓度磷肥的优质原料产地,矿山采用脉内采准中深孔落矿嗣后充填采矿法开采。通过FLAC3D有限差分软件,分析分段采场不同开采跨度下的采场位移与变形特征、顶板最大主应力、顶板垂直应力分布、采场塑性区分布等数值计算结果,得出合理的采场跨度为20 m。

Maluping mine is a high quality sources of raw materials which could produce high-concentration phosphate fertilizer directly without ore dressing, and it is rare in the world and the only one in China currently. In-vein preparatory work medium-length hole falling ore afterwards filling mining method was adopted. Through FLAC3D finite difference software, numerical calculation result such as characteris- tic of displacement and deformation, maximum principal stress of roof, roof vertical stress distribution, plastic zone distribution of stope of different mining spans of sublevel stope , reasonable stope span is 20m is obtained.